Most vapor charging is done with the compressor operating while charging is taking place; however, liquid charging:
A) Is always done with the compressor off.
B) Is typically done on smaller systems with the system on.
C) Can be done either with the system off or operating.
D) Is always done with the compressor on.
C
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When bridging channels are required in an interior gypsum board partition, they must be spaced a maximum of
A) 48 in. on center. B) 36 in. on center. C) 24 in. on center. D) 60 in. on center. E) 12 in. on center.
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Three types of potential threats to the chemical and refining industries are:
What will be an ideal response?
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There are over ____ wind turbines in operation in the United States
a. 25,000 c. 50,000 b. 35,000 d. 75,000
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Which type of leveling device dates back thousands of years?
A) Empire level B) Line level C) Torpedo level D) Water level
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